Hi Jennifer. YES, with both my last pregnancy and now this one, I'm having lower back pain. Last time, I saw a chiropractor which eventually helped. He also showed me some great exercises to do on my ball at home. He said to keep your back strong, you need to keep your core and ab muscles strong. I'm not talking hundreds of crunches. Just gentle bouncing up and down and side to side on the ball, moving your hips like a belly dancer. Once your balance gets good, try lifting one leg and then the other with each bounce, like you're walking while sitting. You can also do some ab squeezes and kegals anytime during the day to keep tight down there. Also try to do some light stretching or yoga every other day or so. Don't overextend. If you don't get regular exercise, try to at least walk every day. I hope this helps. If not, talk to your OBGYN.